EP0914238A1 - Procede et dispositif pour produire des elements mobiles d'une piece en plastique - Google Patents

Procede et dispositif pour produire des elements mobiles d'une piece en plastique

Info

Publication number
EP0914238A1
EP0914238A1 EP97920484A EP97920484A EP0914238A1 EP 0914238 A1 EP0914238 A1 EP 0914238A1 EP 97920484 A EP97920484 A EP 97920484A EP 97920484 A EP97920484 A EP 97920484A EP 0914238 A1 EP0914238 A1 EP 0914238A1
Authority
EP
European Patent Office
Prior art keywords
tool
plastic
mold
plastic component
separating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97920484A
Other languages
German (de)
English (en)
Other versions
EP0914238B1 (fr
Inventor
Georg Kaufmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0914238A1 publication Critical patent/EP0914238A1/fr
Application granted granted Critical
Publication of EP0914238B1 publication Critical patent/EP0914238B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/78—Moulding material on one side only of the preformed part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3041—Trim panels

Definitions

  • the invention relates to a method for producing movable elements of a plastic component produced, for example, by a back-pressing method or a combined master pressure injection molding method and in particular having a decorative layer, the tool shape serving to form predetermined edge regions, which at least part Define the outline of movable elements so that these movable elements can be manufactured in one piece with the plastic component.
  • the invention relates to a tool for producing movable elements of a plastic component, for example produced by a back-pressing process or a combined thermoplastic injection molding method and in particular having a decorative layer, and for separating the edges of this movable element from the plastic component with at least one separating element or a locking slide which has a relatively thin-walled locking or separating blade and which is arranged in the predetermined edge regions of at least part of the outline of these movable elements.
  • plastic components are used which, in addition to functional requirements, also have to meet aesthetic requirements.
  • One example of this is automotive engineering, where interior trims, parcel shelves, dashboards, etc. such plastic components are used.
  • interior trims, parcel shelves, dashboards, etc. such plastic components are used.
  • Plastic component often as a separate surface layer a decor layer attached.
  • the decormater should preferably be made from the same material as the load-bearing plastic component, such monomaterials can therefore be recycled much more cost-effectively than mixed materials that first have to be separated.
  • this back-pressing process just described can be combined with an injection molding process.
  • the back-pressing process is used for the section of the plastic component that is to be provided with the decor layer or the separate surface layer.
  • the processing of the plastics for the combined master pressure injection molding process can be carried out with conventional processing plants. If movable parts such as flaps or sliders are to be provided in such plastic components, hinges or rails and their fastening means made of plastic or metal are normally used.
  • the installation of separately manufactured, moving parts - especially when using materials of a different type - complicates and increases the cost of manufacturing as well as the assembly and above all the recycling of such components.
  • conventional moving components in means of transport when operating them - rattling noises often occur due to vibrations.
  • the invention is intended to remedy this.
  • the object is achieved according to the invention with a method of the type described in the introduction in that the edges of movable elements of the plastic components which are determined to form a flap or a slide are pre-shaped in a certain way and for example with part of the backpressing method or combined backpressing - Injection molding process used tools are cut or punched out before or only after cooling the plastic mass. Because the structural thickness of the plastic component can be narrowed along a certain edge of a flap according to the invention, a film hinge is formed for the flap. Flaps according to the invention are therefore produced in one piece with this plastic component and remain connected to said film hinges along a part of the predetermined edge regions. For the at least partial separation of the movable parts from the plastic component, a locking or separating blade provided in the production tool or, in a separate operation, cutting out with a laser is particularly suitable. The factory separation process can at least happen two different times:
  • a locking blade can prevent plastic material from flowing together in the edge area to be separated from moving elements during the Hmterpress injection molding process.
  • the movable elements can be separated from the load-bearing plastic component by punching or cutting through thinner areas of the edge areas to be separated.
  • the method described above is basically suitable for all plastics that can be processed by the master pressing method or by injection molding.
  • Such materials can be used as a surface layer or decor layer. be used, which enter into a firm connection with a plastic during the back pressing process.
  • Textile materials such as knitted fabrics and plastic films are only examples of this.
  • combinations of plastics and materials of the surface layer are preferred that are of the same type, so that the laminated plastic part can be comminuted with little effort after its intended use and reused as a mono material.
  • handles or recessed grips can be provided with which the movable elements of the plastic components, e.g. shaped as a flap or slide, can be moved safely.
  • the object is also achieved according to the invention with a tool of the type described at the outset in that the tool can be provided with at least one locking slide which can be arranged in such a locking end position that the cavity of the closed mold can be divided into at least two chambers by the locking slide.
  • the locking slide can have an almost arbitrary course in the tool shape, so that a laminated section of the element to be moved can also be produced with a complicated contour.
  • the locking slide has a relatively thin-walled locking or separating blade, whereby particularly precise weld lines or punch lines can be achieved.
  • the locking slide can be actuated pneumatically, electromagnetically, by means of a mechanical drive (eg servo drive) or in particular hydraulically.
  • a mechanical drive eg servo drive
  • Such configurations can be implemented with a relatively low design effort.
  • such drives are available per se as inexpensive and fail-safe standard drives. The invention is explained in more detail below with reference to exemplary embodiments shown schematically in the figures; show it:
  • Figure 1 is a sectional view of a tool according to the invention with a decor layer therein and plastic mass introduced before the mold is completely closed;
  • FIG. 2a shows a detailed view of FIG. 1 with the edge region marked a for producing a laminated, movable element - according to a first embodiment - which abuts the laminated part of a plastic component;
  • FIG. 2b shows a detailed view of the edge region marked with b in FIG. 1 for producing a laminated, movable element - according to a first embodiment - which abuts the non-laminated part of a plastic component;
  • FIG. 2c shows a detailed view corresponding to the edge region marked with a in FIG. 2a for producing a laminated, movable element - according to a second embodiment - which abuts the laminated part of a plastic component;
  • FIG. 3 detailed views of preferred embodiments of flaps and film hinges in cross section: a) edge area without stop, with V-shaped
  • FIG. 4 a-c detailed views of preferred forms of training of handles in cross section
  • Fig. 4 d-f detailed views of preferred embodiments of recessed grips in cross section.
  • the tool 7 shown in FIGS. 1 and 2 a, b according to a first embodiment for combined back-press injection molding is part of a machine for the production of plastic parts, which is not shown otherwise.
  • the tool which is designed as a vertical closing unit, has an upper tool part 4 which is opposite a lower tool part 5 in such a way that its parting line runs essentially horizontally.
  • the tool 7 is provided with at least one locking slide 8, a heating channel 22, a sprue bushing 23 and a control, not shown.
  • the upper part 4 of the tool is designed on its underside so that it has the negative contour of a laminated plastic component to be produced with it.
  • the contour of the cavity 6 formed on the upper tool part 4 runs essentially horizontally. Only at the edge regions 11 does it have vertical sections directed towards the lower tool part 5, which can also be designed as plunge edges 24. Furthermore, with respect to its horizontal extension, it has at least one separating element 15 or a nose 25, which is also directed towards the lower tool part 5.
  • the upper tool part 4 is not shown Provide holding device. There are several vacuum nozzles that evenly between the lugs 25 and the diving edge 24 are distributed.
  • the contour of the tool mold 7 formed on the upper tool part 4 is provided with a support surface 26 on its entire circumference.
  • the upper part 4 of the tool has in each case receiving grooves 27 on its end faces, into which corresponding counterparts of the machine (not shown) engage in order to hold the upper part of the tool in the vertical direction.
  • the lower part of the tool mold 7 is formed, which is also surrounded by a support surface 26 'along its entire circumference.
  • the contour of the tool mold 7, which is provided only at its edge regions and in the middle with n approximately vertical sections, runs essentially horizontally.
  • the horizontal direction of at least one vertical section of the contour is formed as a depression 28 which lies opposite the separating element 15 or the nose 25 of the upper tool part 4.
  • the lower tool part 5 furthermore has an insert 29 which is arranged in a recess of a block 30 of the lower tool part 5 corresponding to it.
  • an insert 29 which is arranged in a recess of a block 30 of the lower tool part 5 corresponding to it.
  • a space 36, 37 is cleared between the lower tool part 5 and a first plate 34 and the first plate 34 and a second plate 35.
  • FIGS. 1 and 2 a, b is arranged in the region of the recess 28 at least one locking slide 8, 8 ', which has a locking 12 or separating blade 13, a push rod 38 and a hydraulic drive unit 39 and cooperates with the nose 25 opposite this recess 28.
  • the hydraulic drive unit 39 which is arranged in the intermediate space 36 on the underside of the block 30, is equipped with a hydraulic cylinder, hydraulic piston, valve and supply lines and control lines which are conventional and therefore not shown in detail.
  • the locking slide 8, 8 ' has a substantially vertically running, thin locking blade 12 or separating blade 13 and a carrier part 20 which is wider by comparison.
  • the blades 12, 13 projecting into the recess are arranged in a slot formed between the insert 29 and the block 30, which slot also serves as a guide for the vertical movements of the blades 12, 13 serves.
  • the arrangement of the blades 12, 13 is carried out in such a way that it is tight against plastic penetration into the slot.
  • the carrier part 20 is located between a receptacle 41 formed by the insert 29 and the block 30, which also serves as a guide for the carrier part 20.
  • an upper end position of the locking blade 12 or separating blade 13 is determined by the support part 20 abutting an upper boundary surface of the receptacle 41.
  • the blades 12, 13 are attached to the upper end of the push rod 38, which is arranged in a continuous recess in the block 30.
  • the push rod 38 is provided with a hydraulic piston, not shown, which is located in the actuating unit 39.
  • the upper tool part 4 When placed on the lower tool part 5, the upper tool part 4 forms a cavity 6 with this, which has a contour that corresponds to the plastic part to be produced.
  • the cavities 6 can have blades 12, 13 of the locking slides 8, 8 ' at least two separate chambers 42, 43 are divided.
  • the separating elements 15 or the lugs 25 and the locking blade 12 or separating blade 13 can be arranged such that they abut against one another and together the chambers 42, 43 seal the other chamber against an overflow of plastic compound m. In this position, the locking slides 8, 8 'also assume their locking end position.
  • FIG. 1 there is an essentially horizontally extending distributor piece 44 of the heating channel 22 in the second intermediate space 37, into which an extrusion screw demands plasticized plastic compound via a sprue bushing 23.
  • At least two feed lines 10 designed as vertically aligned valve gate nozzles 45 ', 45' ', 45' '' flow into the cavity 6 of the tool mold 7 in such a way that the lugs 25 of the tool upper part 4 each lie between the mouths of the Needle valve nozzles 45 ', 45' ', 45' ''.
  • the heating duct 22 is provided with a controllable heating device (not shown), by means of which the plastic material or the base material 9 can be kept at a predetermined temperature or can be heated further.
  • the heating device and the valve gate nozzles 45 ', 45' ', 45' '' shown in the sectional view in FIG. 1 are connected to the control of the machine, as are other valve gate nozzles which are not shown. With this control, the needle valve nozzles can be operated one after the other independently. With regard to the control of the nozzles, this is a so-called cascade control.
  • the tool shown in FIG. 2c with an upper tool part 4 and a lower tool part 5, according to a second embodiment of the present invention, is also part of an otherwise not shown machine with a control, not shown, for example for manufacturing Positioning of plastic parts by means of back presses.
  • the tool shown here largely corresponds to the tool of the first embodiment. The most important differences are: •
  • the separating elements 15 are designed here as fixed shaped blades and are arranged in at least part of the edge areas of movable elements that can be produced in one piece with the plastic components.
  • the gate valve was essentially dispensed with.
  • the depression 28 lies opposite the separating element 15 designed as a fixed shaped blade, which preferably extends almost to the bottom of the depression 28.
  • the cavity 6 can be divided into at least two chambers 42, 43 by the separating elements 15 and the depressions 28 which cooperate with them.
  • the plastic compound or the base material 9 can be brought between the tool parts 4 and 5 using a movable slot die (strand depositing method).
  • the plastic mass or the base material 9 can via needle valve nozzles (source flow method) between the
  • the load-bearing plastic component 3 and the movable elements 1 each comprise a base material, which is designed, for example, as a solid plastic layer, and a decor layer 2.
  • the base material can also be foamed to reduce the weight.
  • the base material can have an area with a significantly reduced thickness or a recess or Show narrowing. If foamed base material is used, the structure of the areas of the depressions can differ from the structure of the rest of the base material - for example, be solid - which affects the life of the film hinges.
  • edge regions 11 and film hinges 14 show preferred embodiments of edge regions 11 and film hinges 14.
  • the edge regions 11 of a movable element 1 can abut the load-bearing plastic component 3 such that, as in FIG. 3a), no stop, or - in particularly preferred embodiments - an stop 21 of the plastic component 3 without (as in FIG. 3b) or with Decor support 2 (as shown in Fig. 3c) is provided.
  • they are hingedly connected to the load-bearing plastic component by means of a film hinge 14 - along a part of the predetermined edge regions 11, which define at least part of the outline of movable elements 1 made in one piece with the plastic component 3 .
  • These film hinges 14 can be provided as V-shaped, trough or trough-shaped depressions or constrictions of the base material of the plastic component 3. Combinations of these forms of training or other deepening that serve the purpose of increasing the flexibility or durability of these film hinges are also conceivable and form part of the present inventive concept.
  • the flaps can be moved against the side of the decor 2 (as shown in FIG. 3) or in the opposite direction.
  • Either the movable element 1 or the plastic component 3 can carry one or more stops 21.
  • the length and number of stops 21 per movable element 1 depend, for example, on the size or the intended use or the load on the movable elements.
  • the length of a stop can be a few centimeters.
  • a stop can also extend along larger parts of the edge regions 11 or along the entire edge region 11 of a movable element.
  • Fig. 3d is a preferred embodiment of a shooting bers 17 shown. Similar to FIG. 3b), a stop 21 is formed, but this is further back from the surface of the decor layer 2. After separation - for example by means of a hand tool, a knife or the like - the edge regions 11 of the load-bearing plastic component 3, the slide 17 can be pressed in from the decor side and moved to a lower position (shown in dashed lines in FIG. 3c). On the lower-lying stop 21, which is preferably extended on at least one suitable side beyond the area of the movable element 1, the slide can be moved into the desired position or closed again, for example using one of the handles shown in FIG. 4 become. A stop (not shown) or multiple stops can prevent the slide from being completely removed. The stop or stops can be provided on the plastic component 3 or on the slide 17 or on both.
  • the movable element 1 can also be formed as a removable cover with or without a stop, which is separated from the load-bearing plastic component at the factory or only later.
  • Such lids can be connected to accessories for automobiles, such as ski bags and the like.
  • handles 18 or recessed grips 19 can serve, as shown in FIGS. 4a) -4c) and 4d) -4f) are.
  • the handles 18 are distinguished by the fact that they can protrude beyond the decor layer 2 and are preferably conically tapered (FIG. 4a), straight (FIG. 4b, c), or filled (FIG. 4a, b) or hollow (FIG. 4c) are designed.
  • the recessed grips 19 can accommodate one or more of these grips 18, in which case the grips 18 preferably do not protrude beyond the recessed grip 19 (FIG. 4d).
  • the wall of the recessed grip 19 can be designed directly as a handle (Fig. 4e), or only conical (Fig. 4d) or straight (Fig. 4f). It is important that these actuators movable elements 1 e are made in one piece with these.
  • These actuating means can be laminated with the same decor layer 2 as the movable element 1 and the plastic component 3, or different colors or textures can be provided for the plastic component, the movable elements 1 or the actuating means or any combination.
  • a surface layer m which is preformed from plastic material in accordance with the desired contour and is designed as a decor layer 2 is the left and middle chamber 42, 42 'of the illustration in FIG Cavity 6 introduced, the vacuum nozzles can hold the decor material 2 on the upper tool part 4.
  • the size of the decor layer 2 is dimensioned such that it can protrude excessively in the area of the plunge edge 24, while it preferably already has the desired size in the area of the separating elements 15 or the locking blade 12.
  • the upper tool part 4 is then moved towards the lower tool part 5 by a vertical movement until the two tool halves, as shown in FIG. 1, are positioned relatively close to one another.
  • Locking slides 8, 8 ' have already been brought to their upper end position, with which they rest with the carrier part 20 on the upper boundary surface of the receptacle 41 (see FIG. 2).
  • the locking blades 12 or separating blades 13 come into contact with the edge of the decor layer 2 m. Since the pressure exerted by the upper part 4 of the tool is greater than the pressure of the drive unit 39 of the locking slides 8, 8 ', the locking blade or separating blade 13 is pushed back slightly. Then the needle valve nozzles 45 'and 45''of the back pressing tool of the mold 7 are opened until a predetermined amount of plasticized plastic material melt or base material 9 has flowed into the left and middle chambers 42, 42' is.
  • the further needle valve nozzles (not shown) that also flow into the chambers 42, 42 'are then opened in succession. These process steps are shown in the illustration in FIG. already done.
  • the plastic compound 9 is applied at a relatively low pressure, so that the melt of the base material 9 remains in the area of the needle valve nozzle 45 ', 45''on the lower tool part 5 without already coming into contact with the decor layer 2 m.
  • the mold 7 is completely closed by a further vertical movement of the upper tool part 4.
  • the tool upper part 4 now prints onto the plastic compound 9 via the decor layer 2, as a result of which the latter is displaced and is distributed uniformly in the chambers 42, 42 '.
  • the plunge edge 24 of the upper tool part 4 closes the tool mold 7 together with the edge 31 of the lower tool part 5.
  • the decorative layer 2 is sheared to its desired size by the plunge edge 24 during the closing movement.
  • the dimensions of the plunge edge 24 are matched to the edge 31 in such a way that the mold 7 remains open for ventilation until the plastic or the base material 9 is in the region of the plunge edge 24 due to the extrusion, but has not yet emerged.
  • Gate valve 8 completely retracted and in the, in this Position, likewise closed, right chamber 43, the same plastic 9 is injected through its needle valve nozzle 45 '''.
  • the edges of the movable elements 1 - by a punching process using at least one separating clamp 13 moved by a locking slide 8 '- along at least part of the predetermined edge regions 11 of the movable ones Elements 1 are separated from the load-bearing plastic component 3. Then the tool 7 is opened again and the finished plastic component 3 is ejected by ejectors arranged on the lower tool part 5, not shown.
  • the chambers 42, 42 '(with decor layer 2) were named “imke” and “middle” chamber or chamber 43 (without decor layer 2) with "right” chamber - taken into account the geometric conditions of FIG. 1.
  • the lmke and middle chamber 42, 42 ' can also be referred to as the "first”, the right-hand chamber 43 also as the "second” chamber.
  • the tool parts designated with the upper tool part 4 or lower tool part 5 can be interchanged in the tool 7, so that the lower tool part 5 picks up the decorative material before the pressing or injection molding process.
  • the movable elements 1 can also be produced in one piece with the load-bearing plastic components 3 by using no molded lugs 25 and movable locking slides 8, but instead as separating elements 15. gene used to form the edge regions 11 (see. Fig. 2c).
  • these separating elements 15 or shaped blades - corresponding to the lugs 25 in the example above - can be formed on the upper tool part 4.
  • Recesses 28 are then also formed on the lower tool part 5 - opposite the shaped blades.
  • the lower edges of these separating elements 15 or for - blades - in the closed state of the tool 7 - can be spaced somewhat from the base of the depressions 28.
  • connection elements such as clips and the like
  • connection elements or fastenings for such as welding studs, adhesive surfaces and the like belong to the scope of the present invention.
  • plastic components 3, which comprise movable elements 1 produced in one piece with them can have molded-on containers on the side of the base material 9, which can accommodate breakdown triangles, sanitary boxes and the like. Struts, reinforcements or pivoting support elements can also be formed. These containers, struts, reinforcements and support elements on the movable elements 1 themselves have further preferred embodiments of the present invention. For example, such support elements can perform the service work on the rear of vehicle lighting devices. make it considerably easier because the movable cover elements 1 can be kept open so that access to the installations to be reached remains free during the service work.
  • Still further embodiments of the movable elements according to the invention include rotary or snap closures for locking the movable elements in a certain open or more or less closed position.
  • the provision of such closure elements naturally also extends to the load-bearing plastic components on which movable elements are integrally formed.
  • Suitable processes for the movable elements 1 which are produced in one piece with supporting plastic components 3 according to the invention are preferably m: back injection, back pressing according to the strand laying or source flow method or any combination of these processes.
  • thermoplastics such as Polypropylene, ABS copolymer (acrylonitrile-butadiene-styrene copolymer) etc. or thermosets such as epoxy resins etc. are possible.
  • thermosets such as epoxy resins etc.
  • These plastics can also be reinforced with fibers or mats, for example.
  • filled plastics, to which talc particles have been added, for example, are also suitable. Different colored decor materials and / or plastics with different textures are often used.
  • movable elements 1 Common to the movable elements 1 according to the invention shown in the figures, regardless of whether they are, for example, lids, flaps 16 or sliders 17, is an edge bent away in the edge region 11 from the main surface of the movable element 1, which thus covers with a decor layer his can that it runs preferably and substantially parallel with the edge similarly bent away from the main surface of the supporting plastic component 3. As a result, the two edges can rub against one another with their surfaces and form a so-called shadow gap on the surface provided with the decor layer (known for example in the automotive industry).
  • This has the advantage that the movable elements, even if they are separated from the load-bearing plastic component 3 in the edge regions 11, do not cause rattling noises and act as essentially continuous sound insulation.
  • snap closures or similar locking devices are largely superfluous.
  • the base material which connects the movable elements 1 m to the edge regions 11 with the load-bearing plastic components 3, is preferably made so thin that it can be easily cut with the tools mentioned or similar.
  • the edge regions 11 can at least partially also be designed as a straight joint.
  • the thin areas which connect the base material 9, for example a flap 16, to the load-bearing plastic component 3 can be dispensed with.
  • Equipment or cladding elements in means of transport for example in cars, buses, trams, trains, ships or airplanes:
  • the movable elements according to the invention can be provided in installations such as Zurrosen station wagons and transporters, safety devices, water tanks and their em - Cover full openings etc. or containers for accessories such as tools, first-aid kits, breakdown triangles etc.
  • Cladding or furnishing components in houses e.g. in bathrooms, mob legs, shops, exhibition equipment:
  • the movable elements according to the invention can cover service openings in bath tub aprons or shower cups as well as fuse or distribution boxes for electrical systems in apartments or exhibition facilities.
  • Equipment or cladding elements in means of transport e.g. in suitcases for luggage, files or instruments:
  • the movable elements according to the invention can cover containers in the case shell or in partition walls as well as address and other subjects.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour produire des éléments (1) mobiles d'une pièce (3) en plastique comportant une couche décorative (2), dont une surface est notamment pourvue d'une couche décorative (2), et qui peuvent être réalisés d'un seul tenant avec les pièces (3) en plastique. A cet effet, deux moitiés d'outil (4, 5) forment une cavité (6) d'un moule d'outil (7) et le matériau utilisé à des fins décoratives peut être appliqué sur une des moitiés d'outil avant compression, de manière à se situer essentiellement dans une première chambre (42, 42') qui se trouve séparée par la fermeture du moule d'outil (7) et éventuellement par le transfert d'au moins un registre d'arrêt (8, 8') dans sa position de blocage finale dans la cavité (6). Après introduction de la matière plastique (9) dans la première chambre (42, 42') par l'intermédiaire d'au moins une conduite d'amenée (10) et après fermeture du moule d'outil (7), le registre d'arrêt (8') peut être sorti de sa position d'arrêt et une seconde matière plastique (9) est injectée dans la seconde chambre (43) de la cavité (6). Par séparation le long de zones marginales (11) prédéfinies, qui définissent au moins une partie du contour d'éléments mobiles (1) produits d'un seul tenant avec la pièce (3) en plastique, ladite pièce (3) en plastique peut être réalisée sous forme de monomatériau avec des éléments mobiles (1).
EP97920484A 1996-06-27 1997-05-22 Procede et dispositif pour produire des elements mobiles d'une piece en plastique Expired - Lifetime EP0914238B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH161096 1996-06-27
CH1610/96 1996-06-27
CH161096 1996-06-27
PCT/CH1997/000202 WO1998000279A1 (fr) 1996-06-27 1997-05-22 Procede et dispositif pour produire des elements mobiles d'une piece en plastique

Publications (2)

Publication Number Publication Date
EP0914238A1 true EP0914238A1 (fr) 1999-05-12
EP0914238B1 EP0914238B1 (fr) 2001-03-07

Family

ID=4214464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97920484A Expired - Lifetime EP0914238B1 (fr) 1996-06-27 1997-05-22 Procede et dispositif pour produire des elements mobiles d'une piece en plastique

Country Status (14)

Country Link
EP (1) EP0914238B1 (fr)
AT (1) ATE199515T1 (fr)
AU (1) AU2688797A (fr)
BR (1) BR9710058A (fr)
CA (1) CA2257281A1 (fr)
CZ (1) CZ403198A3 (fr)
DE (1) DE59703113D1 (fr)
DK (1) DK0914238T3 (fr)
ES (1) ES2155684T3 (fr)
HU (1) HU221689B1 (fr)
IL (1) IL127419A (fr)
PL (1) PL184274B1 (fr)
PT (1) PT914238E (fr)
WO (1) WO1998000279A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734666A1 (de) 1997-08-11 1999-02-18 Bayer Ag Flammwidrige Polycarbonat-ABS-Formmassen
DE19734686A1 (de) * 1997-08-11 1999-02-18 Otto Deuschle Modell Und Forme Kunststoff-Formteil sowie Verfahren und Vorrichtung zu dessen Herstellung
GB2330791B (en) 1997-10-30 2002-05-08 Boucherie Nv G B Method of molding toothbrushes and apparatus for performing the method
AT406759B (de) * 1999-04-08 2000-08-25 Magna Eybl Gmbh Abdeckung für ein airbag-modul
DE19958316C1 (de) * 1999-12-03 2001-02-22 Hans H Schmitz Verfahren und Vorrichtung zum Herstellen eines Kunststoffformteils, welches mehrere Felder umfaßt
US6838027B2 (en) 1999-12-30 2005-01-04 Delphi Technologies, Inc. Method of making an interior trim panel
EP1112831A1 (fr) * 1999-12-30 2001-07-04 Delphi Technologies, Inc. Procédé de fabrication d'un panneau de garniture intérieure
DE102011108942B4 (de) * 2011-07-29 2021-06-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines Bauteils aus einem ersten und einem zweiten Material

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US5395668A (en) * 1990-08-29 1995-03-07 Toyoda Gosei Co., Ltd. Air bag apparatus
US5335939A (en) * 1991-11-13 1994-08-09 Toyoda Gosei Co., Ltd. Air bag device
JP2701683B2 (ja) * 1992-10-30 1998-01-21 豊田合成株式会社 樹脂成形体の製造方法
FR2720320B1 (fr) * 1994-05-26 1996-09-20 Cera Procédé d'inclusion d'un décor, notamment textile, dans une pièce en matière plastique.
DE19505155A1 (de) * 1995-02-16 1996-08-22 Magna Zippex Autotechnik Gmbh Verfahren zum Herstellen eines Auskleidungsteiles aus Kunststoff und ein insbesonders nach diesem Verfahren hergestelltes Auskleidungsteil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9800279A1 *

Also Published As

Publication number Publication date
PL330896A1 (en) 1999-06-07
ES2155684T3 (es) 2001-05-16
DE59703113D1 (de) 2001-04-12
CZ403198A3 (cs) 1999-04-14
ATE199515T1 (de) 2001-03-15
CA2257281A1 (fr) 1998-01-08
AU2688797A (en) 1998-01-21
PL184274B1 (pl) 2002-09-30
HUP9904272A3 (en) 2000-12-28
WO1998000279A1 (fr) 1998-01-08
BR9710058A (pt) 2000-01-11
PT914238E (pt) 2001-08-30
DK0914238T3 (da) 2001-07-16
EP0914238B1 (fr) 2001-03-07
IL127419A0 (en) 1999-10-28
HUP9904272A2 (hu) 2000-05-28
HU221689B1 (hu) 2002-12-28
IL127419A (en) 2001-03-19

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